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  • 1970-1974  (2)
  • 1955-1959
  • 1971  (2)
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  • 1970-1974  (2)
  • 1955-1959
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  • 1
    Digitale Medien
    Digitale Medien
    Regulation of Growth and Invertase Activity by Kinetin and Gibberellic Acid in Developing Avena Internodes (1971)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 25 (1971), S. 0 
    Details
    ISSN: 1399-3054
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Evidence presented here indicates that there is a complex interaction between kinetin, gibberellin, and sucrose in the regulation of turnover of invertase in vivo. The synthesis of invertase is maintained in the presence of GA3 and sucrose over relatively long periods of time. Kinetin, on the other hand, inhibits the full development of invertase activity seen in the sucrose and gibberellin control treatments. Moreover, the peak in invertase activity occurs earlier with kinetin treatment. During invertase turnover, once the peak is reached, kinetin enhances the rate of decay of enzyme activity relative to synthesis. The regulatory significance of invertase in intercalary growth and possible modes of kinetin action in this process are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1399-3054.1971.tb01428.x
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  • 2
    Digitale Medien
    Digitale Medien
    Regulation of Growth in Avena Stem Segments by Gibberellic Acid and Kinetin (1971)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 24 (1971), S. 0 
    Details
    ISSN: 1399-3054
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Kinetin at physiological concentrations causes significant reduction of GA3-promoted growth in excised Avena stem segments. Kinetin is therefore considered to be a gibberellin-antagonist in this system. A Lineweaver-Burke plot reveals that kinetin acts non-competitively with GA3. The kinetin inhibition of GA3-promoted growth can be seen within 6 hours. It was found that soluble protein is markedly increased by kinetin in the tissue during the first 3 hours, thus preceding the inhibition of GA3-promoted growth by several hours. At the cellular level, kinetin negated the blocking effect of GA3 on cell division in the intercalary meristem portions of these segments. In fact, kinetin promotes both lateral and longitudinal cell divisions in intercalary meristem cells.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1399-3054.1971.tb03524.x
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